How do you unfold lines in Vim?
The zr command will open all first-level folds in Vim, and zR will open all of the folds in the file. The zm command will re-fold the first-level folds, and zM will close all open folds in a file.
How do I undo in Vim?
Undo Changes in Vim / Vi
Press esc to return to normal mode. Any character typed in normal mode will be interpreted as a vim command. Press u, :u, or :undo to undo the last change (entry).
How do I collapse a row in Vim?
With the following in your vimrc, you can toggle folds open/closed by pressing F9. In addition, if you have :set foldmethod=manual , you can visually select some lines, then press F9 to create a fold. Here is an alternative procedure: In normal mode, press Space to toggle the current fold open/closed.
How do I expand all lines in Vim?
With this mapping, to create a fold, you can hit v to enter visual mode (or Shift-v to enter line-oriented visual mode), select some lines with the arrow keys, and hit spacebar to collapse the selected lines. To expand the lines, put the cursor over the fold and hit spacebar (in vim terminology, this deletes the fold).
What is text folding?
Code or text folding, or less commonly holophrasting, is a feature of some graphical user interfaces that allows the user to selectively hide (“fold”) or display (“unfold”) parts of a document. This allows the user to manage large amounts of text while viewing only those subsections that are currently of interest.
How do I mark in Vim?
Setting marks
To set a mark, type m followed by a letter. For example, ma sets mark a at the current position (line and column). If you set mark a, any mark in the current file that was previously identified as a is removed. If you set mark A, any previous mark A (in any file) is removed.
How do I delete 10 lines in Vi editor and undo the changes?
Pressing dd multiple times will delete multiple lines.
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Deleting a Line
- Press the Esc key to go to normal mode.
- Place the cursor on the line you want to delete.
- Type dd and hit Enter to remove the line.
How do a undo command work in Vi?
Undoing the Previous Command
If you make a mistake in vi or if you just change your mind after an operation is completed, you can undo your last command by pressing u immediately after the command. You do not need to press Esc after you type u . By pressing u a second time you undo the undo.
What is folding in Vim?
Folding is a way to hide a chunk of text, and thus unclutter the view. That comes handy when you need to focus on some other part of code, or if you want to get a quick overview of the whole file. Vim folding in action.
What is folding editor?
A folding editor extends the principle of tree structured directories to editing text files. This allows the simultaneous display of large amounts of text by folding sections of text away behind a descriptive heading. This results in a tree structure very similar to a subdirectory structure of, for example, UNIX.
What is fold in programming?
In functional programming, fold (also termed reduce, accumulate, aggregate, compress, or inject) refers to a family of higher-order functions that analyze a recursive data structure and through use of a given combining operation, recombine the results of recursively processing its constituent parts, building up a …
What does Ctrl o do in Vim?
In insert mode, pressing Ctrl-O switches to normal mode for one command, then switches back to insert mode when the command is finished.
How do I mark a line in vi?
To mark a line in vim, use the m command followed by an alphabet that represents the name of the mark (available options are a-z in lowercase). For example, ma. Now, to come back to the mark a, use the ‘a command (single quote included).
How do you undo and redo in vi?
Remember, yo undo a change in Vim / Vi use the command u , and to redo a change which was undone use Ctrl-R .
How do I get rid of lines above in vi?
Deleting a single line in Vim editor:
To delete a line, follow the steps below: First, bring your cursor to the line you want to delete. Press the “Esc” key to change the mode. Now type, “:d”, and press “Enter” to delete the line or quickly press “dd”.
How many times can you use the vim undo command?
2 Answers. Show activity on this post. You have only 1 level of undo if you are in Vi compatible mode. You are missing out on a number of features by being in ‘compatible’ mode.
How do I enable code folding or code?
Use VS Code’s folding feature to fold the svg lines.
- Put your cursor anywhere on the line with the starting svg tag.
- Open the Command Palette (Cmd/Ctrl + Shift + P)
- Select “Fold”
What is folding in programming?
What is fold fault?
Folds constitute the twists and bends in rocks. Faults are planes of detachment resulting when rocks on either side of the displacement slip past one another.
Is fold same as reduce?
¹ A fold is just a different name for a reducing operation. This name can be seen in Haskell, Purescript, and other functional languages. ² Actually, if you try hard enough — not that you should try—most loops and recursive functions can be written using reduce .
What is Ctrl U in Vim?
In insert mode, pressing Ctrl-u deletes text you’ve typed in the current line, and Ctrl-w deletes the word before the cursor.
What is Ctrl N in Vim?
Ctrl-N to insert the next matching word; or. Ctrl-P to insert the previous matching word.
How do I delete 10 lines in vi editor and undo the changes?
What is the command for undo?
Ctrl+Z
To undo an action press Ctrl+Z. If you prefer your mouse, click Undo on the Quick Access Toolbar.
How do I delete a range of lines in Linux?
The sed command can remove the lines of any range. For this, we just have to enter ‘minimum’ and ‘maximum’ line numbers. In this example, we will remove the lines ranging from 4 to 7 numbers. After removing these ranges of lines, our file will look like this.